We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
EXTRATOS AQUOSOS DE PLANTAS DANINHAS, AROMÁTICAS E OLEAGINOSA NO CONTROLE DE MELOIDOGYNE INCOGNITA.
- Authors
Kuhn, Paulo Roberto; Bellé, Cristiano; Reinehr, Marcela; Kulczynski, Stela Maris
- Abstract
The control of plant-parasitic nematodes using toxic substances from plants of different natural and agricultural ecosystems offers an alternative management strategy for economically important crops with low environmental risks. Aqueous extracts of certain weeds (Conyza bonariensis, Senecio brasiliensis, Bidens pilosa, Amaranthus hybridus, Euphorbia heterophylla, Raphanus sativus, Ipomoea purpurea, and Brachiaria plantaginea), aromatic herbs (Ruta graveolens and Aloysia triphylla), and oilseed (Brassica napus) plants were studied for their potential in the control of Meloidogyne incognita in tomato in both in vitro and in vivo tests. Eggs or second stage juveniles (J2) of M. incognita were subjected to incubation in 5% (w/v) aqueous extracts of the plants in Petri plates. After 24-hr incubation, the mortality of J2 was recorded and after 48 hr, the eclosion of M. incognita J2 was analyzed to determine the area under the outbreak progress curve (AUHPC). Subsequently, an "in vivo" bioassay was conducted under greenhouse conditions to evaluate the addition of 20 mL of aqueous extracts of the plant species to sterilized soil in which tomato was planted and inoculated with 5,000 eggs + J2/plant. Plant response including chlorophyll levels and reproduction of M. incognita were evaluated after 60 d. The aqueous extracts of Ruta graveolens, Conyza bonariensis, and Brassica napus resuled in higher J2 mortality and a lower AUHPC. Extracts of the same plants used in vivo lowered the number of galls in the roots and nematode reproduction, resulting in plant growth increase, higher root length, and greater chlorophyll content. This study provides evidence of the potential of these aqueous extracts as an economically attractive method for management of M. incognita.
- Publication
Nematropica, 2015, Vol 45, Issue 2, p150
- ISSN
0099-5444
- Publication type
Article